// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial

export component Button {
    in property<bool> enabled : true;
    out property <bool> pressed;
    in-out property <bool> checked;
    callback clicked();
}

export component C1 {
    out property <bool> out;
    in property <bool> in;
    in-out property <bool> inout;
    property <bool> priv;

    // pressed is "output" in Button
    out <=> b.pressed;  // ok  (but then there should be no other assignment?)
    in <=> b.pressed; // Error
//  ^error{Cannot link to a output property}
    inout <=> b.pressed;
//  ^error{Cannot link to a output property}
    priv <=> b.pressed; // makes assignment forbidden



    b:= Button {
        clicked => {
            in = !in;
//          ^error{Assignment on a input property}
            out = !out;
//          ^error{Cannot modify a property that is linked to a read-only property}
            inout = !inout;
            priv = !priv;
//          ^error{Cannot modify a property that is linked to a read-only property}

            self.enabled = !self.enabled;
            self.checked = !self.checked;
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}

        }
    }

}


  export component C2 {
    out property <bool> out;
    in property <bool> in;
    in-out property <bool> inout;
    property <bool> priv;

    // enabled is "input" in Button
    out <=> b.enabled;
    in <=> b.enabled;
    inout <=> b.enabled;
    priv <=> b.enabled;

    b:= Button {
        clicked => {
            in = !in;
//          ^error{Assignment on a input property}
            out = !out;
            inout = !inout;
            priv = !priv;


            self.enabled = !self.enabled;
//          ^error{Cannot modify a property that is linked to a read-only property}
            self.checked = !self.checked;
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}

        }
    }
}

export component C3 {
    out property <bool> out;
    in property <bool> in;
    in-out property <bool> inout;
    property <bool> priv;

    // checked is "input/output" in Button
    out <=> b.checked;
    in <=> b.checked;
    inout <=> b.checked;
    priv <=> b.checked;

    b:= Button {
        clicked => {
            in = !in;
//          ^error{Assignment on a input property}
            out = !out;
            inout = !inout;
            priv = !priv;

            self.enabled = !self.enabled;
            self.checked = !self.checked;
//          ^error{Cannot modify a property that is linked to a read-only property}
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}
        }
    }
}


export component C5 {
    out property <bool> out;
    in property <bool> in;
    in-out property <bool> inout;
    property <bool> priv;

    Button { enabled <=> out; }
    Button {
        enabled <=> in;
        clicked => { self.enabled = !self.enabled; }
//                   ^error{Cannot modify a property that is linked to a read-only property}
    }
    Button { enabled <=> inout; }
    Button { enabled <=> priv; }
}

export component C6 {
    out property <bool> out;
    in property <bool> in;
    in-out property <bool> inout;
    property <bool> priv;

    Button {
        checked <=> out;
        clicked => { out = !out; self.checked = !self.checked; }
    }
    Button {
        checked <=> in;
//      ^error{Cannot link to a input property}
        clicked => { self.checked = !self.checked; }
    }
    Button {
        checked <=> inout;
        clicked => { inout = !inout; self.checked = !self.checked; }
    }
    Button {
        checked <=> priv;
        clicked => { priv = !priv; self.checked = !self.checked; }
    }
}

export component C7 {
    b1 := Button {
        clicked => {
            self.enabled = !self.enabled;
            self.checked = !self.checked;
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}
        }
    }
    Button {
        enabled <=> b1.pressed;
        clicked => { self.enabled = !self.enabled; }
//                   ^error{Cannot modify a property that is linked to a read-only property}
    }
    b2 := Button {
        clicked => {
            self.enabled = !self.enabled;
            self.checked = !self.checked;
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}
        }
    }
    Button { checked <=> b2.pressed;  }
//           ^error{Cannot link to a output property}

    b3 := Button {
        clicked => {
            self.enabled = !self.enabled;
            self.checked = !self.checked;
            self.pressed = !self.pressed;
//          ^error{Assignment on a output property}
        }
    }
    Button {
        checked <=> b3.checked;
        enabled <=> b3.checked;
    }
    Button {
        checked <=> b3.enabled;
        enabled <=> b3.enabled;
    }
}

export component C8 {
    out property <bool> out1;
    out property <bool> out2;
    out property <bool> out3;
    out property <bool> out4;

    out property <bool> out <=> out1;
    in property <bool> in <=> out2;
    in-out property <bool> inout <=> out3;
    property <bool> priv <=> out4;

    Button {
        clicked => {
            out1 = !out1;
            out2 = !out2;
//          ^error{Cannot modify a property that is linked to a read-only property}
            out3 = !out3;
            out4 = !out4;
        }
    }
}

export component C9 {
    in property <bool> in1;
    in property <bool> in2;
    in property <bool> in3;
    in property <bool> in4;

    out property <bool> out <=> in1;
    in property <bool> in <=> in2;
//                        ^error{Cannot link to a input property}
    in-out property <bool> inout <=> in3;
//                               ^error{Cannot link to a input property}
    property <bool> priv <=> in4;

    Button {
        clicked => {
            out = !out;
//          ^error{Cannot modify a property that is linked to a read-only property}
            in = !in;
//          ^error{Assignment on a input property}
            inout = !inout;
            priv = !priv;
//          ^error{Cannot modify a property that is linked to a read-only property}
        }
    }
}


export component C10 {
    in-out property <bool> inout1;
    in-out property <bool> inout2;
    in-out property <bool> inout3;
    in-out property <bool> inout4;

    out property <bool> out <=> inout1;
    in property <bool> in <=> inout2;
//                        ^error{Cannot link input property}
    in-out property <bool> inout <=> inout3;
    property <bool> priv <=> inout4;

    Button {
        clicked => {
            inout1 = !inout1;
            inout2 = !inout2;
            inout3 = !inout3;
            inout4 = !inout4;
            out = !out;
            in = !in;
//          ^error{Assignment on a input property}
            inout = !inout;
            priv = !priv;
        }
    }
}

export component C11 {
    property <bool> priv1;
    property <bool> priv2;
    property <bool> priv3;
    property <bool> priv4;

    out property <bool> out <=> priv1;
    in property <bool> in <=> priv2;
    in-out property <bool> inout <=> priv3;
    property <bool> priv <=> priv4;

    Button {
        clicked => {
            priv1 = !priv1;
            priv2 = !priv2;
//          ^error{Cannot modify a property that is linked to a read-only property}
            priv3 = !priv3;
            priv4 = !priv4;
            out = !out;
            in = !in;
//          ^error{Assignment on a input property}
            inout = !inout;
            priv = !priv;
        }
    }
}

export Legacy1 := Rectangle {
    b1:= Button {}
    in property in1 <=> b1.pressed;
//                  ^warning{Link to a output property is deprecated}
    out property out1 <=> b1.pressed;
    in-out property inout1 <=> b1.pressed;
//                         ^warning{Link to a output property is deprecated}


    property <bool> p1;
    Button {
        pressed <=> p1;
//      ^warning{Assigning to output property 'pressed' is deprecated}
        clicked => {
            p1 = !p1;
            out1 = !out1;
//          ^warning{Modifying a property that is linked to a read-only property is deprecated}
        }
    }
    Button {
        enabled <=> self.pressed;
        clicked => {
            self.enabled = !self.enabled;
//          ^warning{Modifying a property that is linked to a read-only property is deprecated}
        }
    }


}

